We study the one-loop contributions of the gaugino-Higgsino sector to the process of top-quark pair production via yy fusion at the NLC in framework of the minimal supersymmetric standard model. We find that the corrections to gamma--> and e(+)e(-) --> gamma gamma --> are found to be significant and can approach a few percent and one percent, respectively. Furthermore, the dependences of the corrections on the supersymmetric parameters are also investigated. The corrections are not sensitive to M-SU(2) (or \mu\) when M-SU(2) much greater than\mu\ (or \mu\ much greater than M-SU(2)) and are weakly dependent on the tan beta with M-Q (or \mu\) being large enough. However, they are sensitive to the c.m.s. energy of the incoming photons.